Electro-magnetic escapement apparatus for printing-telegraphs



(No Model.)

G. B. SCOTT.

ELECTED MAGNETIC ESCAPEMENT APPARATUS FOR PRINTING TELEGRAPHS, No. 320,975. Patented June 30, 1885.

MmM/mw Smoewtoz UNITED STATES PATENT OFFICE.

GEORGE B. SCOTT, OF BROOKLYN, NE? YORK.

ELECTRO-IVIAGNETIC ESCAPEMENT APPARATUS FOR PRINTING-TELEGRAPHS.

SPECIFICATION forming part of Letters Patent No. 320,975, dated June 30,1885.

Application filed January 2, 1885.

To all whom it may concern:

Be it known that I, GEORGE B. Scorr, of the city of Brooklyn, county of Kings, State of New York, a citizen of the United States of America, have made a new and useful Improvement in Escapement Apparatus for Gontrolling the Rotation of Type-\Vheels in Printing-Telegraphs, of which the following is a specification.

My invention relates to that class of printing-telegraphs in which the type-wheel is rotated step by step through the combined agency of a motor and an escapement device whose to-and-fro movement permits an intermittent step-by-step movement.

In the accompanying drawings, Figure 1 is a front View of an escapement apparatus. Fig. 2 is a side view of portions of said escapement apparatus.

B is one of the brass side plates forming a part of the frame of a printing telegraph instrument.

r is a bracket-plate having a right-angular extension, 8, fastened to the base-plate B by means of screws to, and. to the lower side of extension 8 is rigidly fastened a permanent electric horseshoemagnet, a, by a rivet or screw, 1*. The permanent magnet rests with its inner face next to the base-plate B, but is rigidly connected therewith only by rivet t. The upper and free ends of the limbs of the horseshoe-magnet a are respectively provided with pole-pieces I) c. The arms of the permanent magnet are flexible and elastic, and their pole-pieces are respectively adjusted by setscrews f g, by means of which varying pressure may be applied and the arms of the permanent magnet bent to a greater or less degree, as may be required. The adjusting set'screws f g are respectively mounted in screw-brackets d e, which are also fastened by screws to the base-plate m is an electro-magnet having an axial opening, mounted upon a shelf, h. Shelf h is provided with two arms extending backward therefrom, over the ends of which and parallel with plate B is secured a plate, 45. Plate i and plate h form bearings for the journal j, which supports armature is, pivoted thereon. To the upper end of armature 7c are attached escapement-pallets Z, the amplitude of whose movement is limited by adjustable setscrews p g, respectively mounted in brackets n 0, which are also secured to the base-plate B.

10 is the escapementwheel mounted upon (No model.)

the typewheel shaft, and the end of said shaft near the escapement-wheel is mounted in a bracket, which is also secured to the baseplate B.

I do not desire to herein broadly claim the combination of a coil, a permanent magnet embracing the core, and a core movable therein and pivoted at or near the neutral point of the permanent magnet, as such matter forms a part of another application filed by me for the purpose of an interference with the patent of S. D. Field, No. 291,705, dated January 8, 1884.

\Vhat I claim, and desire to secure by Letters Patent, is-

1. The combination of base-plate B, per manent flexible magnet a, rigidly fixed to said base-plate at one point, adj usting-screws f g, electromagnet m, and armature 7c, substantially as described.

2. The combination of electro-magnet m, axial armature-lever k, adjustable pole-pieces Z) c, and permanent magnet a, having flexible arms rigidly fixed to its support at or near its neutral point.

3. The combination of electro-magnet m, axial armature 7c, escapement-pallets Z, escapement-wheel w, limiting-stops p q, flexible permanent magnet a, rigidly connected to a baseplate, B, at one point, adjusting-screws f g, brackets d e, for supporting said adjustingscrews, and brackets n 0, for adjusting the limiting-stops p q, as described.

4. The combination of plate B, bracket h, secured thereto, electromagnet m, supported by said bracket, plate '6, journal j, armature is, permanent magnet a, having flexible arms, bracket r, for connecting the permanent magnet to the base-plate, and adjusting-screws 5. The combination of a vertical plate, B, having brackets h r (l e a 0, permanent flexi ble magnet a, electro-magnet m, axial armature 7c, adjusting-screws f g, and adjustable stops 1) q, substantially as described.

6. The combination of a vertical plate, B, brackets h 0-, flexible permanent magnet a, electro-magnet m, axial armature A, polepieces I) c, and adjusting-screws f g.

7. The combination of a base-plate, B, bracket 9', flexible permanent magnet a, pole pieces I) c, and adj ustingscrews f g.

\Vitnesses: GEO. B. SCOTT.

XVM. ARNOUX, W. M. FAIRFAX. 

